<template>
    <div class="list" ref="wrapper">
      <div>
        <div class="area">
          <div class="title border-topbottom">当前城市</div>
          <div class="button-list">
            <div class="button-wrapper">
              <div class="button">{{this.currentCity}}</div>
            </div>
          </div>
        </div>
        <div class="area">
          <div class="title border-topbottom">热门城市</div>
          <div class="button-list">
            <div class="button-wrapper" v-for="item in hotCities" :key="item.id" @click="handleCityClick(item.name)">
              <div class="button" >{{item.name}}</div>
            </div>
          </div>
        </div>
        <div
          class="area"
          v-for="(item, key) in citiesList"
          :key="key"
          :ref="key"
        >
          <div class="title border-topbottom">{{key}}</div>
          <div class="item-list">
            <div
              class="item border-bottom"
              v-for="val in item"
              :key="val.id"
              @click="handleCityClick(val.name)"
            >
              {{val.name}}
            </div>
          </div>
        </div>
      </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hotCities: Array,
    citiesList: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const ele = this.$refs[this.letter][0]
        this.scroll.scrollToElement(ele)
      }
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper, { mouseWheel: true, click: true, tap: true })
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color #ccc
    &:after
      border-color #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow hidden
    position absolute
    top 1.56rem
    left 0
    right 0
    bottom 0
  .title
    line-height .54rem
    background #eee
    padding-left .2rem
    color #666
    font-size .26rem
  .button-list
    padding .1rem .6rem .1rem .1rem
    overflow hidden
    .button-wrapper
      float left
      width 33.33%
      .button
        text-align center
        margin .1rem
        border .02rem solid #ccc
        border-radius .1rem
        padding .1rem 0
  .item-list
    .item
      line-height .76rem
      color #666
      padding-left .2rem
</style>
